Answer: Heat energy can be transferred from one object to another because of a difference in temperature.
Explanation: Heat energy is transferred from a warmer to a cooler object through conduction, convection and radiation. All of these require a temperature difference for heat to transfer.
Answer:
Temperature difference
Every matter has heat energy. The result of the movement of minute particles known as atoms, molecules, or ions in liquids, solids, and gases is nothing but heat energy. Heat energy can be transferred by one substance to another and the flow because of the temperature difference between two objects is known as heat.
how is molecular formula related to empirical formula?
The molecular formula gives the actual number of atoms of each element present in a molecule, while the empirical formula gives the simplest whole number ratio of atoms of each element present in a molecule.
The molecular formula and the empirical formula of a compound are related but they are not the same. The molecular formula is the actual number of atoms of each element present in a molecule of the compound, while the empirical formula gives the simplest whole number ratio of atoms of each element present in a molecule of the compound.
In other words, the molecular formula expresses the exact number of atoms of each element present in a molecule and the empirical formula expresses the relative number of atoms of each element. For example, glucose has a molecular formula of C6H12O6, but its empirical formula is CH2O, which gives the simplest ratio of atoms in the molecule. In general, the molecular formula can be a multiple of the empirical formula.
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PLS HELP ME ASAP I NEED HELP PLS PLS PLS PLS PLS PLS PLS PLS PLS PLS
The balanced chemical reaction of sodium and sulfur can best be described as: B. 2Na(s) + S(s) → Na₂S(s)
How can the reaction be represented?To represent the reaction between sodium and sulfur, we would express the elements and their states as shown above. So, 2 atoms of sodium would react with 1 atom of sulphur to yield a compund known as sodium sulphide.
This compound contains two atoms of sodium and 1 atom of sulphur. The physical state is solid. So, the correct option number that expresses this is B.
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what is the word equation for CS2(1)+3O2(g)->CO2(g)+2SO2(g)
Answer:
liquid carbon disulfide and oxygen gas produce carbon dioxide gas and sulfur dioxide gas
Explanation:
A tank containing 35 gallons of water is leaking at a rate of 1/4 gallon per minute.
A tank containing 35 gallons of water is leaking at a rate of 1/4 gallon per minute. The expression to determine the number of gallons left in the tank after m minutes is 35- m/4.
Considering that a 35-gallon water tank leaks at a rate of a quarter per minute.
Let "m" stand for the duration in minutes.
Gallons remaining in the tank equal the sum of the water that was originally inside and the water that has leaked.
35 gallons of water are still available after subtracting the amount of minutes spent at the rate of leakage.
Water remaining in gallons = 35 gallons - m minutes x 1/4
Water remaining in gallons = 35 - m/4
Your question is incomplete but most probably your full question was
A tank containing 35 gallons of water is leaking at a rate of 1/4 gallon per minute. Write an expression to determine the number of gallons left in the tank after m minutes.
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what is the percent composition of hcl by numbers of atoms?
Answer:
H is 2.74%
Cl is 97.24%
Explanation:
HCl molar mass is 36.458
H is 1 so 1/36.458 is .0274 or 2.74 percent
Cl is 35.453 so 35.453/36.458 is .9724 or 97.24 percent
In a third experiment, 0.10 g samples of Mg(s) are placed in excess HCl(aq) of various concentrations:
0.050 M, 0.10 M, 0.25 M, and 0.50 M. The reactions are run in successive order from 0.050 M to
0.50 M, and the time required for each reaction to go to completion is recorded. As the concentration of HCl(aq)
increases from 0.050 M to 0.50 M, which of the following is the expected result?
(A), The reaction time increases, and the rate of the reaction decreases.
The reaction time decreases, and the rate of the reaction increases.
(C) Both the reaction time and the rate of the reaction increase.
(D) Both the reaction time and the rate of the reaction decrease.
+2H30+ H₂AsQ₂ + 1₂ + H₂O
The expected result as the concentration of HCl(aq) increases from 0.050 M to 0.50 M is: (B) The reaction time decreases, and the rate of the reaction increases.
What is the expected result?An aqueous solution of hydrogen chloride is what is known as hydrochloric acid, also referred to as muriatic acid. It has an unmistakably strong odor and is colorless. It is categorized as a powerful acid. It is a part of the gastric acid in most animal species' digestive systems, including humans.
The expected result as the concentration of HCl(aq) increases from 0.050 M to 0.50 M is that the reaction time decreases, and the rate of the reaction increases. This is because as the concentration of the acid increases, the number of acid molecules in the solution increases and therefore the number of collisions between acid molecules and magnesium increases. This leads to more frequent and successful collisions and a faster rate of reaction.
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Calculate the approximate molecular weight of a protein composed of 701 amino acid residues in a single polypeptide chain. kDa approximate weight:
One single amino acid weighs 110 D a. Now, this problem is fairly simple. The way we find out, the weight of 701 amino acids is just multiplying. Ah, that number by 110. So all we have to dio is multiply 682 by 110. So our final answer will be 77,110.
What is amino acid?Amino acids are the building blocks of protein. Proteins are long chains of amino acids. Your body has thousands of different proteins that each have important jobs. Each protein has its own sequence of amino acids. The sequence makes the protein take different shapes and have different functions in your body.You can think of amino acids like the letters of the alphabet. When you combine letters in various ways, you make different words. The same goes for amino acids — when you combine them in various ways, you make different proteins.Amino acids are molecules used by all living things to make proteins. Your body needs 20 different amino acids to function correctly. Nine of these amino acids are called essential amino acids. Essential amino acids must be consumed through the food you eat. Essential amino acids can be found in a variety of foods, including beef, eggs and dairy.To learn more about molecules refer to:
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The empirical formula of a chemical substance is c2h3. the molar mass of a molecule of the substance is 54.091 g/mol. what is the molecular formula of the chemical substance? a. c2h4 b. c4h8 c. c4h6 d. c6h9
The molecular formula of the chemical substance is C2H3 * 2.068 = C4H6 which is option (c)
The empirical formula of a chemical substance gives the lowest whole-number ratio of atoms in a molecule. The molar mass of a substance is the mass of one mole of the substance. To find the molecular formula of a substance, we need to determine the ratio of atoms in the molecule and compare it to the ratio given by the empirical formula.
The molar mass of the substance is 54.091 g/mol, and the empirical formula is C2H3. To find the molecular formula, we can divide the molar mass by the molar mass of the empirical formula.
54.091 g/mol / (2 x 12.011 g/mol + 3 x 1.008 g/mol) = 54.091 g/mol / 26.042 g/mol = 2.068
Since the ratio of atoms in the molecule is 2.068 times that of the empirical formula, the molecular formula is C2H3 * 2.068 = C4H6 which is option (c)
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Answer:
C4H6 (c)
Explanation:
I took the test
What are the four types of verbal irony?
The four types of verbal irony are verbal irony, sarcasm, innuendo, and hyperbole.
Verbal irony is the intentional use of words to express something different from what is said. It is a figure of speech often used for comedic effect, to emphasize a point or to add emphasis.
Sarcasm is a type of verbal irony that is used to mock, ridicule, or criticize someone. Innuendo is a type of verbal irony that implies a hidden meaning or suggests something without directly saying it.
Finally, hyperbole is an exaggerated statement used in an attempt to make a point or to emphasize something. All four types of verbal irony can be used to make a point more effectively or to add humor to a conversation.
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All of the following statements about lighteners are true EXCEPT:
a) they are used at relatively high levels
b) they slowly block the production of melanin in the skin
c) they are used to bleach or lighten areas of hyperpigmentation
d) they usually take months of continued use to deliver a noticeable effect
The following statement is not true about lighteners- " They are used at relatively high levels'.
Skin lighteners are products that are designed and used to bleach the skin from dark spots and pigments. They are usually used to improve one's physical appearance such as blemishes, dark patches and birthmarks.
They work on the skin by reducing or slowly blocking the production of melanin in the skin. The pigment melanin is responsible for the colour it gives to our skin. It also protects our skin from the harmful effects of the sun.
It usually takes few weeks or even three to four months for lighteners to show effective results on continued usage.
Thus, option (a) is correct.
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Choose the correct condensed structure from the name: hexene.
O CH3CHCHCHCH3
O CHCCH2CH3
O CH3CH2CH2CH2CH2CH3
O CH3CH2CHCHCH2CH3
The correct condensed structure of hexene is CH₃CH₂CH=CHCH₂CH₃.
A condensed structural formula also termed as semi-structural formula and it is used to describe the organic compounds in a line of text. They will be illustrated in a single line of text and specifies the atoms in the order which are located in a molecule.
Hexene is a hydrocarbon having chemical formula C₆H₁₂. It s used as a comonomer in the production of the polyethylene. There are several number of isomers in hexene, depending on the geometry and position of the double bond in the chain. One of the most common useful of isomers is 1-hexene as well as an alpha-olefin.
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Draw the lewis structure for resonance forms of acetamide (CH3CONH2)
The Lewis structure for acetamide is drawn by connecting the atoms with single bonds and assigning lone pairs of electrons to the non-bonding atoms.
The central carbon atom has four bonds and no lone pairs, while the oxygen atom has two bonds and two lone pairs. The two nitrogen atoms each have three bonds and one lone pair. The hydrogen atoms only have one bond each, as they only have one electron in their outer shell.
For the resonance forms of acetamide, the Lewis structure is drawn by connecting the atoms using double bonds instead of single bonds, while keeping the same number of lone pairs.
This forms a resonance hybrid between the two forms, where the electrons are delocalized. The central carbon atom has two double bonds and no lone pairs, while the oxygen atom has one double bond and two lone pairs. The two nitrogen atoms each have two double bonds and one lone pair. The hydrogen atoms also only have one bond each.
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If 25.0 ml of a 2.0 m naoh solution is used for the reaction
To solve this problem is not necessary to have the chemical reaction. Just use the formula of Molarity and solve it for moles.
moles = 0.2 x 0.025=0.005.
Define mole?In the International System of Units, a substance's amount is measured in moles, which are denoted by the sign mol. The quantity of a substance is a measurement of the number of elementary entities of a specific substance present in an object or sample. Exact 6.022140761023 elementary items are required to define a mole.The unit of measurement known as the mole (symbol: mol) refers to the quantity of matter in a system that includes the same number of atoms as there are in 0.012 kilograms of carbon 12.Previously, a mole was defined as the quantity of atoms found in 12 grams of carbon-12, as determined through experimentation.The complete question is:
NaOH (aq) + HCl(aq) H2O + NaCl (aq)
If 25.0 mL of a 0.2 M NaOH solution is used for the reaction
shown above, how many moles of NaOH were involved in the
reaction? _moles.
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The number of moles for the chemical reaction will be equal to 0.005, if 25.0 ml of a 2.0 m NaOH solution are used.
What is mole?The amount of a material is expressed in moles, which are represented by the symbol mol in the International System of Units. A substance's amount is a measurement of how many of its fundamental components are present in an object or sample. To define a mole, precisely 6.022140761023, elementary components are needed.
The term "mole" (symbol: mol) refers to the amount of matter in a system that contains the same number of atoms as there are in 0.012 kilograms of carbon 12. Previously, a mole was determined through experimentation to be the number of atoms present in 12 grammes of carbon-12.
Determine the number of moles:moles = 0.2 x 0.025=0.005.
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The complete question is:
NaOH (aq) + HCl(aq) H2O + NaCl (aq)
If 25.0 mL of a 0.2 M NaOH solution is used for the reaction
shown above, how many moles of NaOH were involved in the
reaction? _moles.
a 0.32 m aqueous solution of an unknown solute has a density of 1.08 g/ml. the molar mass of the solute is 146.8 g/mol. what is the molality of this solution? report your answer in mol/kg and round to the second decimal place.
Answer: 0.31
Explanation:
molarity = 0.32 mol of solute / 1 L solution
find kg of solute: 0.32 mol of solute x 146.8 g/mol = 46.976 g = 0.046976 kg
find kg of solution: 1 L solution x (1000 mL / 1 L) x (1.08 g/mL) (1 kg / 1000 g) = 1.08 kg solution
find kg of solvent: 1.08 kg solution - 0.046976 kg solute = 1.033 kg water
molality = 0.32 mol solute / 1.033 kg water = 0.31 mol/kg
According to molar concentration , the molality of the solution upto second decimal place is 0.31 m.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion.
molarity = 0.32 mol of solute / 1 L solution.To find kg of solute-0.32 mol of solute x 146.8 g/mol = 46.976 g = 0.046976 kg. To find kg of solution: 1 L solution x (1000 mL / 1 L) x (1.08 g/mL) (1 kg / 1000 g) = 1.08 kg solution. To find kg of solvent: 1.08 kg solution - 0.046976 kg solute = 1.033 kg water.
Thus, molality = 0.32 mol solute / 1.033 kg water = 0.31 mol/kg.
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A cylinder containing carbon dioxide of volume 20L at 2.0 atm was connected to another cylinder of certain volume at constant temperature. The final pressure of the gas in the cylinders was found to be 380 mm Hg. Calculate the volume of the second cylinder.
Answer:
Vfinal = 22.7 L
Explanation:
PV = nRT
(2.0 atm)(20 L) = n(0.0821 L-atm/K-mol)(273 K)
n = 0.195 moles of CO2
P (final)V (final) = nRT
(380 mmHg)(Vfinal) = (0.195 moles)(0.0821 L-atm/K-mol)(273 K)
Vfinal = 22.7 L
Type the correct answer in each box. what is the empirical formula? a compound being used in experimental medicine is 78.14% boron (b) and 21.86% hydrogen (h). the empirical formula of the compound will have a boron to hydrogen ratio of : .______
In chemistry, the empirical formula of a chemical compound is the simplest whole number ratio of atoms present in a compound.
What is the empirical formula? In chemistry, the empirical formula of a chemical compound is the simplest whole number ratio of atoms present in a compound. A simple example of this concept is that the empirical formula of sulfur monoxide, or SO, would simply be SO, as is the empirical formula of disulfur dioxide, S2O2. Thus, sulfur monoxide and disulfur dioxide, both compounds of sulfur and oxygen, have the same empirical formula. However, their molecular formulas, which express the number of atoms in each molecule of a chemical compound, are not the same.The molecular formula, on the other hand, shows the number of each type of atom in a molecule.The structural formula shows the arrangement of the molecule. It is also possible for different types of compounds to have equal empirical formulas.The empirical formula is BH₃. Its B:H ratio is 1:3.
Assume that you have 100 g of the compound.
Then you have 78.14 g B and 21.86 g H.
Now, we must convert these masses to moles and find their ratios.
From here on, I like to summarize the calculations in a table.
Element Mass/g Moles Ratio Integers
B 78.14 7.2285 1 1
H 21.86 21.686 3.0001 3
The empirical formula is BH₃.
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The empirical formula will have a boron to hydrogen ratio of 1:3.
What is the empirical formula?In chemistry, the empirical formula of a chemical compound is the simplest whole number ratio of atoms present in a compound. A simple example of this concept is that the empirical formula of sulfur monoxide, or SO, would simply be SO, as is the empirical formula of disulfur dioxide, S2O2.
Thus, sulfur monoxide and disulfur dioxide, both compounds of sulfur and oxygen, have the same empirical formula. However, their molecular formulas, which express the number of atoms in each molecule of a chemical compound, are not the same.
The molecular formula, on the other hand, shows the number of each type of atom in a molecule. The structural formula shows the arrangement of the molecule. It is also possible for different types of compounds to have equal empirical formulas.
Determination of boron to hydrogen ratio in empirical formula:The empirical formula is BH₃. Its B:H ratio is 1:3.
Assume that you have 100 g of the compound.
Then you have 78.14 g B and 21.86 g H.
Now, we must convert these masses to moles and find their ratios.
From here on, I like to summarize the calculations in a table.
Element Mass/g Moles Ratio Integers
B 78.14 7.2285 1 1
H 21.86 21.686 3.0001 3
The empirical formula is [tex]BH_{3}[/tex].
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What is the number of ammonia molecules made when 6 grams of hydrogen gas reacts with excess nitrogen? 3 H2+ N2 <-----> 2 NH3 a. 24 x 10^23 b. 6 x 10^23 c. 12 x 10^23 d. 18 x 10^23
The number of ammonia molecules made when 6 grams of hydrogen gas reacts with excess nitrogen is 12 × 10²³ molecules.
The reaction is given as :
3H₂ + N₂ ⇄ 2NH₃
Mass of the hydrogen = 6 g
moles of the hydrogen = mass / molar mass
= 6 / 2
= 3 mol
3 moles of the H₂ produces 2 moles of the NH₃
moles of the NH₃ = (2 / 3) × 3
= 2 mol
1 mol = 6.022 × 10²³ molecules
molecules of the ammonia, NH₃ = 2 × 6.022 × 10²³ molecules
= 12 × 10²³ molecules
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Based on its chemical formula, the percent composition of sodium chloride, NaCl, (to four significant figures) is
So, sodium and chloride make up 39.3% and 60.7%, respectively, of NaCl.
What is sodium and chloride?A compound's constituent elements are always present in the same proportions by mass, according to the Law of Definite Proportions. The relative mass of each element in a compound is indicated by the complex's percent composition. A compound's elemental mass represented as a portion of the compound's overall mass is called the mass percent. One oxygen atom and two hydrogen atoms, for instance, make up the structure of the water molecule. Both hydrogen and oxygen make up 88.8% and 11.2% of the total mass, respectively. The whole composition of a water molecule is shown by these figures. In light of this, the % composition of every pure water sample will always be the same. Meaning that water will contain 88.8% oxygen and 11.2% hydrogen.Example:
What is the % composition of a compound with a total mass of 34.37 g, of which 21.43 g is phosphorous and 12.94 g is magnesium?
Mass percent of magnesium equals 12.94g/34.37g, or 37.6%
21.43g/34.37g or 62.4% of the mass is made up of P.
Magnesium and phosphorous make up 37.6% and 62.4%, respectively, of this compound's percent composition.
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Cyanides inhibit lactose permease by A. Competing with lactose for the binding site on permease B. Abolishing the lactose gradient between the inside and outside of the cell C. Abolishing the proton gradient between the inside and outside of the cell D. Blocking conformational changes of the transporter B A
Cyanides inhibit lactose permease by abolishing the proton gradient between the inside and outside of the cell
By interfering with the proton gradient across the cell membrane, cyanides prevent the lactose permease protein from transporting lactose across the membrane. Protons (H+) are pumped out of the cell by the proton-motive force, which results in a difference in proton concentration between the inside and outside of the cell and creates the proton gradient.
This proton gradient is used by lactose permease to propel lactose transport into the cell. The enzyme cytochrome oxidase, which is found in the mitochondria and is in charge of the last stage of the electron transport chain, binds to the iron atom in the active site. This binding prevents the enzyme from working, which inhibits proton pumping and causes the proton gradient to fall, both of which hinder lactose permease from working.
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What would a liquid at 50 degrees Celsius. I want to know it’s melting and boiling point.
A liquid at 50 degrees Celsius would have a melting point of 50 degrees Celsius and a boiling point of approximately 173.15 degrees Celsius.
What is the liquid?
iquid is a state of matter that has a definite volume, but does not have a fixed shape. It is one of the four fundamental states of matter, along with solid, gas, and plasma. Liquids tend to have a greater volume than solids, but geneLrally take the shape of their container. Examples of liquids include water, milk, blood, gasoline, and oil. Liquids are composed of molecules that tend to have greater mobility and can easily flow past each other. Depending on the temperature, pressure, and composition of the liquid, it can undergo changes in the state of matter.
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What amino acid sequence will be created during translation?
The amino acid sequence will be determined by the codons in the mRNA sequence that is being translated.
During translation, the mRNA sequence is read three nucleotides at a time, and each codon is translated into an amino acid based on the genetic code. This process is known as the "triplet code" because codons are made of three nucleotides.
The ribosome reads the mRNA sequence and translates it into a protein by recruiting amino acids in the correct order. The tRNA molecules carry the correct amino acids to the ribosome, where they are added to the growing polypeptide chain.
The ribosome continues to read the mRNA sequence until it reaches a stop codon, which signals the end of the translation and the completion of the amino acid sequence.
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REPORT SHEET EXPERIMENT Colorimetric 22 Determination of an Equilibrium Constant in Aqueous Solution A. Preparation of the Calibration Curve Concentration of Fe(NO) in 0.10 MHNO3 solution O 2 M Concentration of NaSCN in 0.10 M Nos solution 0.002 M Flask Number volume of NascN, mL O Solution Initial [SCNT], M x 10-5 Equil. [FeNCs: MM Percent T 13.2 21.2. Absorbance 0.412. B. Determination of the Equilibrium Constant Concentration of Fe(NO3)3 in 0.10 MHNOn solution 0.002 M. Concentration of NasCN in o.10 M HNo, solution 0.002 M. Test Tube Number Solution Temperature Volume of Fe (NO3, 5 Solution, mL Volume of NaSCN Solution, mL Initial [Fe M 0.00 0.001 0.001 0.001 0.001 0.001 8.0x10 0.001 Initial [SCN 1. M 293
The Equilibrium Constant Concentration of Fe(NO3)3 is Keq 2.79*10^2 and molar extinction coefficient is 4438 L/mol.
Slope of the above calibration curve represents molar extinction coefficient in L/mol for Fe(SCN)2+.
Hence
= 4438 L/mol
B. Determination of K:
Test tube-2: A = 0.193
=> [Fe(SCN)2+]eq = A /
b = 0.193 / 4438 L/mol x 1 = 4.35x10-5 M
[Fe3+]eq = 0.001 - 4.35x10-5 M = 9.565x10-4 M
[SCN-]eq = 2.0x10-4 M - 4.35x10-5 M = 1.565x10-4 M
Keq = [Fe(SCN)2+]eq / ([Fe3+]eq x [SCN-]eq)
=> Keq = 4.35x10-5 M / ( 9.565x10-4 Mx1.565x10-4 M) = 2.91x102
Test tube-3: A = 0.331
=> [Fe(SCN)2+]eq = A /
b = 0.331 / 4438 L/mol x 1 = 7.46x10-5 M
[Fe3+]eq = 0.001 - 7.46x10-5 M = 9.254x10-4 M
[SCN-]eq = 4.0x10-4 M - 7.46x10-5 M = 3.254x10-4 M
Keq = [Fe(SCN)2+]eq / ([Fe3+]eq x [SCN-]eq)
=> Keq = 7.46x10-5 M / (9.254x10-4 Mx3.254x10-4 M) = 2.48x102
Test tube-4: A = 0.512
=> [Fe(SCN)2+]eq = A /
b = 0.512 / 4438 L/mol x 1 = 1.15x10-4 M
[Fe3+]eq = 0.001 - 1.15x10-4 M = 8.85x10-4 M
[SCN-]eq = 6.0x10-4 M - 1.15x10-4 M = 4.5x10-4 M
Keq = [Fe(SCN)2+]eq / ([Fe3+]eq x [SCN-]eq)
=> Keq = 1.15x10-4 M / (8.85x10-4 Mx4.5x10-4 M) = 2.89x102
Test tube-5: A = 0.634
=> [Fe(SCN)2+]eq = A
b = 0.634 / 4438 L/mol x 1 = 1.43x10-4 M
[Fe3+]eq = 0.001 - 1.43x10-4 M = 8.57x10-4 M
[SCN-]eq = 8.0x10-4 M - 1.43x10-4 M = 6.57x10-4 M
Keq = [Fe(SCN)2+]eq / ([Fe3+]eq x [SCN-]eq)
=> Keq = 1.43x10-4 M / (8.57x10-4 Mx6.57x10-4 M) = 2.54x102
Test tube-6: A = 0.890
=> [Fe(SCN)2+]eq = A /

b = 0.890 / 4438 L/mol x 1 = 2.01x10-4 M
[Fe3+]eq = 0.001 - 2.01x10-4 M = 7.99x10-4 M
[SCN-]eq = 0.001 M - 2.01x10-4 M = 7.995x10-4 M
Keq = [Fe(SCN)2+]eq / ([Fe3+]eq x [SCN-]eq)
=> Keq = 2.01x10-4 M / (7.99x10-4 Mx7.99x10-4 M) = 3.15x102
Average Keq
= (2.91x102 +2.48x102 +2.89x102 +2.54x102 +3.15x102 ) / 5
= 2.79x102
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The atomic mass of the element niobium (Nb) is 92.906 amu. Which measurement is correct?(1 point)
Responses
1 mole of Nb = 92.906 grams
1 mole of Nb = 92.906 grams
1 gram of Nb = 92.906 moles
1 gram of Nb = 92.906 moles
1 gram of Nb = 92.906 atoms
1 gram of Nb = 92.906 atoms
1 mole of Nb = 92.906 atoms
Niobium has an atomic mass of 92.90638 u. An atomic mass unit serves as the unit of measurement for mass (amu). A mass unit of an atom is 1.66 x 10-24 grammes.
What does the term "atomic" refer to?
Atomic is derived from the Greek word atomos, which means "uncut" or "indivisible," and means "indivisible particle" in Latin. atomic is defined as an adjective that refers to, contains, or is related to atoms.
What does atomic energy entail?
Nuclear energy, also known as atomic energy, is the considerable quantity of energy released in operations that have an impact on atomic nuclei, or dense centres of atoms. It differs from other atomic phenomena' energy, which solely involves an atom's orbital electrons in regular chemical reactions, for example.
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Answer:
1 mole of Nb = 92.906 grams
a substance that donates one proton when dissolved in water
A. analyte
B. diprotic acid
C. salt
D. triprotic acid
E. monoprotic acid
F. titrant
A monoprotic acid is an acid that donates one proton (H+) when dissolved in water. Thus option E is the correct answer.
A monoprotic acid is an acid that donates one proton (H+) when dissolved in water, thus forming the corresponding conjugate base and hydronium ions (H3O+). Examples of monoprotic acids include hydrochloric acid (HCl), sulfuric acid (H2SO4), and acetic acid (CH3COOH).
A diprotic acid is an acid that donates two protons when dissolved in water. An example of diprotic acid is sulfuric acid (H2SO4). A tricrotic acid is an acid that donates three protons when dissolved in water. An example of tricrotic acid is phosphoric acid (H3PO4). An analyte is a substance or ion that is being analyzed in a chemical or biological sample.
Salt is a neutral compound formed from the reaction of an acid and a base, which typically contains positively and negatively charged ions. A titrant is a solution of known concentration, used to determine the concentration of an unknown solution through a titration process.
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A gas at 600 torr and 300 K is heated to a final volume of 1000 torr. What is the final temperature of the gas?
Answer:
500K
Explanation:
We use Charle's law that states that at a constant pressure the volume of a given mass of a gas varies linearly with absolute temperature of the gas.
V ∝ T
V = kT
∴ k is the proportionality constant
v/T = as it a ratio between volume and temperature the value of k would be a constant quantity.
Therefore it can be written as:
v1 / T1 = V2 / T2
Now solving the question:
V1 = 600 torr
T1 = 300 K
V2 = 1000 torr
T2 = ?
600/300 = 1000/T2
T2= (1000 x 300)/600
T2= 500 K
A 0.1 m solution is diluted by three orders of magnitude. what is the new concentration?
So the new concentration of the solution is 0.0001M.
What is magnitude?A magnitude is the measurement or absolute value of a quantity. A magnitude is represented by a positive real number. Put simply, a magnitude is the size of some quantity. For example, the magnitude of an earthquake, measured on the Richter scale, usually varies between 1 and 10 and represents the size of the earthquake. An earthquake with a magnitude of 8 is much more trouble than an earthquake with a magnitude of 3.The magnitude of a number, unlike the magnitude of a physical quantity, is not relative to a scale or set of units: the magnitude of 100 is 100. By contrast, the magnitude of a ruler is 12 in inches but is 30.48 in centimeters. Outside of pure mathematics one has to be careful to specify the units in which the magnitude of some quantity is measured.To learn more about magnitude refer to:
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The Coriolis effect is the deflection of moving objects from a straight path due to Earth's rotation. Which of the following is the result of the Coriolis effect?
The result of the Coriolis effect is the rotation of the earth on its axis. So the correct option is B.
What is the Coriolis effect?The Coriolis effect is a type of force to which the fluids of the earth are exposed. It is the acceleration they receive due to the rotation of the earth, what is generated is a deviation in their trajectory which now causes their trajectory to be curved. This force it is exposed to is called the coriolis force, but it is not a real force since there is nothing pushing on it.
The acceleration to which the fluids are exposed will be perpendicular to the axis of rotation of the earth and to the components of its velocity.
Therefore, we can confirm that the correct option is B. the rotation of the earth on its axis.
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The Coriolis effect is the result of which of the following?
A. winds spinning off the equator
B. the rotation of the earth on its axis
C. the different air movements north and south of the equator
D. the friction that slows down winds near the earth’s surface
What is the term for the chromosomes that are identical after DNA replication?
Sister chromatids is the term for the chromosomes that are identical after DNA replication.
Sister chromatids are identical chromosomes that are created during the process of DNA replication. DNA replication is the process where a DNA strand is copied, creating a new strand. During this process, each chromosome is split in half, forming two identical halves.
These halves are known as sister chromatids and are held together by a centromere. Sister chromatids are attached to one another during the interphase stage of the cell cycle and are separated during the metaphase stage of the cell cycle.
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Which of these things you will not find in the periodic table?AElement Name and SymbolBAtomic WeightCNumber of neutronsDAtomic Number
Option (c) is correct. The number of neutrons will not be find in the periodic table.
Periodic table is the arrangement of chemical elements. Chemical elements are arranged in rows that is called periods and columns that is called groups according to increasing atomic number. Scientists use the periodic table to refer to information about an element like atomic mass and chemical symbol. The periodic table’s arrangement also allows to discern trends in element properties including electronegativity, ionization energy, and atomic radius. We can find the name of the element, symbol, atomic weight of the element, atomic number. We can not find the number of neutrons in the periodic table. the properties of the chemical elements exhibit an approximate periodic dependence on their atomic numbers.
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Explain why the atomic radius of hydrogen is so much smaller than that the atomic radius for potassium.